Chemical Constituents from the Water Extract of Alpinia Oxyphylla Miq. (Ⅰ)

OBJECTIVE To study the chemical constituents from the water extract of Alpinia oxyphylla Miq.. METHODS The chemical constituents were isolated by solvent and Sephadex LH-20 methods. The structures were identified on the basis of chemical methods and spectroscopic evidence. RESULTS Five compounds were identified as protocatechuic aldehyde(1), protocatechuic acid(2), p-coumaric acid(3), (-)-epicatechin(4), (+)-catechin(5). CONCLUSION Compounds 1, 3 and 4 are obtained for the first time from this genus and compound 5 is obtained for the first time from this species.